docs: def human_readable(self, dense_repr: Sequence[Sequence[int]]) -> List[List[str]]:
          """ Returns a human readable version of a dense representation of
          either or reference to facilitate simple manual inspection.
          """
  
          transcripts = []
          for dense_r in dense_repr:
              non_empty_phonemes = [phn_i for phn_i in dense_r if phn_i != 0]
              transcript = self.corpus.indices_to_labels(non_empty_phonemes)
              transcripts.append(transcript)
  
          return transcripts